DETECTION OF LEAKAGE IN COFFERDAMS OF A HYDROPOWER STATION
It is introduced in this paper employing electromagnetic technique to detect and to locate leakage in cofferdams of a hydropower station construction recently. After fulfillment of high-pressure grouting walls, serious leakage was found in both upstream and downstream cofferdams. In order to locate the correct leakage position in the high-pressure grouting walls and foundation, Type GDP-32II Instrument based on transient (time domain) electromagnetic technique and EM34-3 Ground Conductivity Meter based on frequency domain electromagnetic technique were employed. The detecting results were satisfied and were validated by drilling and underwater TV. The principle of the instruments and detecting techniques are also introduced here.
leakage in cofferdams detect electromagnetic technique
JIA Yongmei YAO Chenglin FANG Chungang LU Ying WANG Huibin
China Institute of Water Resources and Hydropower Research, IWHR
国际会议
西安
英文
1-16
2005-11-01（万方平台首次上网日期，不代表论文的发表时间）